Telephone-receiver.



W. W. DEAN. TELEPHONE RECEIVER. APPLICATION FILED NOV. 1, 1909.

1 ,006,833, Patented 0ct.24,1911.

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WILLIAM W. DEAN, OF ELYR-IA, OHIO, ASSIGNOR TO THE DEAN ELECTRIC COMPANY,

' 0F ELYBIA, OHIO, A CORPORATION OF OHIO.

TELPHONE-RECEIVER.

1 ,ootrcaa Specification of Letters Patent.

Patented 0a. 2a, ion.

Original application filed October 8, 1908, Serial No. 456,760. Divided and this application filedlNovember 1, 1909. Serial No. 525,747.

'l'o all whom it may concern:

lie it known that I, \VJLLIAM \V. DnAN, a citizen of the United States, residing at .l llyria, in the county ot',Iiorain and State of Ohio, have invented a certain new and use ful Improvement in Telephone-lleceivers, of which the following is a full, clear, concise, and exact description, reference being had tothcaccompanying drawings, forming a part of this specification.

This application is a division of my appli cation 456,760, filed October 8th, 1908.

My invention relates to telephone receivers, and has for its object the construction of a receiver shell of metal which shall accomplish all the purposes heretofore secured in connection with shells for such instrun'ient-s and having the additional advantage of lightness, durability, improved appearance and cheapness.

Here-toi ore, receiver shells have commonly been made from insulating material of one form or another which, generally speaking, is very brittle in nature, and, therefore, easily broken. To avoid this ditliculty the shells have usually been constructed of considerable. thickness, with the result that they are both clumsy and heavy. The thickness to which it is was necessary to make these shells, made the use of metal prohibitive. By my invention I construct these shells of thin sheet metal andupset them at the edges and cut threads in the upset parts. These threads are adapted to cooperate with the threaded portion of the receiver cap. lhis receiver cap may be constructed in one piece, or it may be constructed in a manner similar to the body port-ionot'the shell; that is, it may be upset and threaded at the edge. It preferred, a cap of insulating material may be used in connection with the metal shell instead of the metallic cap which is re- 'lerred to.

in I constructing my improved receiver shelhl make use pretcraldy of forming dies to form suitable sheet metal into the desired contoru'iation. In order to be readily ma.- nipulatcd so as to assume the term required, the sheet metal used. must be preferably relatively thin. lliis thin metal, however, is not adapted to he tl'ireaded, since the which is thick enough to permit the cutting operation and to bear threads large enough for practical purposes. The end of the shell reil'itorced by the upsetting operation so that it mayreadily engage the threaded portion of the companion part Without buckling or bending. The shell is thus made of material thin enough to be sutliciently light for all practical purposes and at the same time furnish a practical joint.

In connection with the use of sheet steel for forming the main portion of the shell proper and the cap, I employ a protecting varnish or coating, as, for example, enamel or apan to thoroughly protect the steel from the contact of moisture. In addition to the insulation thus secured by the enamel coating within the shell, I employ separate insulating means between the shell and the cooperating mechanism of the receiver contained therein. I find that vulcanized fiber answers admirably for this purpose, although other insulating material may be used, if desired.

The several drawings illustrat g my invention are as follows:

Figure 1 is a longitudinal cross-section of the receiver shell of my invention containing the receiver parts and showing both the shell and cap to be upset t the edge. Fig. 2 is a modification showing the shell upset and a receiver cap carrying the threaded ring. Fig. 3 'is-anotlier modification showing the cap ups and the shell proper bearing a threaded ring.

Referring now to the drawings and tothe embodiments of my invention there shown, I have illustrated at l the receiver shell upset and threaded at the edge 4. As a companion portion. a receiver cap 2 upset and threaded at 3. "Within the shell I show a substantially cylindrical fiber insulator The end of this closed by a perforated tll l t, of insulating material. The receiver .n'itll is perforated for the passage of the eonduetor cord at T. the edges ot. the pert'orat ion being bent around to prevent the ehating' oi" the cord. The receiver cup. located within the ear end, is shown at 8 the eleetro-inagnets at t), the diaphragm at it), the permanent magnets at 11. At 12 I show nuts forelamping the parts together.

1 is the terminal tip. The eonduetor eo'rd leading to this tip is shown at t-t.

A hollow flange 15 is l'ormed ol the end of the receiver shell. When the receiver is hung up, this flange catches upon the re-,

ceiver hook and retains the receiver in place thereon.

It will be seen that all portions of the shell and cap, except the upset edges. are made of very thin material and it, will be readily apparent that this material is too thin to bear the threads which have beeir ent upon the upset portions.

At Fig. 2 I show a shell t upset amt threaded at. 4-, a. cap 3' and insulating dial: (3 between the two. The r211) folded over at. 21, embracing a threaded ring it) which is set within the edge of the cap and which cooperates with the threads upon the np set portion of the shell to unite the two parts.

In Fig. 3 I show a shell part 1 t'olded over at its edge at 21 so as to 't'orm a ehan net in which is located a threaded ring it). The cap is shown at 2 and the perlorated insulating disk (3, between the two parts. The cap is upset and threaded at It" to engage the threaded ring upon the shell to unite the two parts.

\Vhile l have shown my invention in these particular Ollll)()(lltll0l]t8, I do not wish to be limited thereto, as it will be obvious to those skilled in the art.- that numerous and extensive departures from the torn] and details here shown may be made without departing From the spirit. ot this invention, the same being herein shown solely tor the purpose of clearly illustrating the prel'erred embodiment and the two modili ations which have been shown.

I claim:

I. telephone receiver shell consi ting of two elements, one ot. whiehis the body portion of the shell and the other a cap.

each of sueh elements upset'and threaded at one end, siu:li' tlire:nlml portions adapted to engage each other.

2. In a. telephone receiver shell, a body portion and a cap, the body portion eonstrueted of sheet, material too thin and light to bear threads of sullieieut size for a practieal joint,llpset" at its ends to a thiel ness sullieient to hear such threads and threaded on such upset portion, said threaded portioirada'pted to engage the cap to unite the two.

3. tn a telephone reeeiver shell, a body portion and a cap portion, each constructed ot sheet materiattoo thin and light to bear threads of snllieient size for a practical joint between the portions, each upset at its end to a thickness sutlieient to hear such threads, and each threaded upon said upset portion. said threaded portion adapted to engage to unite the parts.

- -l-. tn a telephone receiver shell, a body portion and a cap portion, one of said portions emistrueted of n'iaterial too thin to bea r threads of sullieient size for a practical joint between the portions, such portion upset at its end sutlieiently to admit of threads of sueh size and threads cut in the upset. portion. such threaded portion adapted to engage the companion part to unite the two together. l

5. In a telephone receiver shell, a body portion and a cap portion, one of said portions eonstruetml oti material too thin to bear threadsot' sutlieient. size for a practical joint between the portions, such portion upset. at its end sutticiently to admit of t'ln'eads-o t' sueh size and threads cut in the up et portion, sueh threaded portion adapted to' engage tluveompanion part to unite the two together, and a layer of insulating material within the body portion.

H. In a telephone receiver shell, the combination ot a body part constructed of matel'iul too thin to bear threads, said shell be ing of a substantially tubular shape, expanded at one end into a. substantially t'rusto-eonieal shape and open at said end, the edges ol said open end being upset and threaded and a cap adapted to engage said threads to unite it to the body portion, a telephone receiver in said shell and an insulating disk clamped between said shell and said cap.

T. In a telephone receiver shell, the combination ot a body part eonstiruetedot ma terial too thin to bear threads, said shell being ol substantially tubular shape expanded at one .end into a substantially l'rusto-eonieal shape and open at said end, the edges ol" said open end being upset and threaded and a eap adapted to engage said threads" to :mite it to the body portion, the other end of the shell' being perforated for the ronduetor eord and the edges of the perl'orationturned up to prevent chaling of the cord. p i

8. in a telephone receiver shell, the eombination 01 a body part: constructed of material too thin ,to bear threads, said shell being ol' suhstantially tubular shape,- expanded at one end into a substantially t'rusto-mnieal shape and open at. said end,

the edges ol said open end' being upset and threaded and a cap adapted to engage in presence of two witnesses this 29th (11 Silht threads to unite it to the body portion, of ()et.., 190$). HIHtl hotly portion perforated for the reeeirer eon] and being folded upward and outward at sueh perforations so as to prevent ehutiu g of the r eeiver cord. In testhnouy whereof I aflix my signature WILLIAM W. DEAN.

\Vit nesses F. t). Ihenm', A. D. '1. LIBBY. 

